Faithful execution of developmental programs relies on the acquisition of unique cell identities from pluripotent progenitors, a process governed by combinatorial inputs from numerous signaling cascades that ultimately dictate lineage-specific transcriptional outputs. Despite growing evidence that metabolism is integrated with many molecular networks, how pathways that control energy homeostasis may affect cell fate decisions is largely unknown. Here, we show that AMPK, a central metabolic regulator, plays critical roles in lineage specification. Although AMPK-deficient embryonic stem cells (ESCs) were normal in the pluripotent state, these cells displayed profound defects upon differentiation, failing to generate chimeric embryos and preferentially adopting an ectodermal fate at the expense of the endoderm during embryoid body (EB) formation. AMPK-/- EBs exhibited reduced levels of Tfeb, a master transcriptional regulator of lysosomes, leading to diminished endolysosomal function. Remarkably, genetic loss of Tfeb also yielded endodermal defects, while AMPK-null ESCs over-expressing this transcription factor normalized their differential potential, revealing an intimate connection between Tfeb/lysosomes and germ layer specification. The compromised endolysosomal system resulting from AMPK or Tfeb inactivation blunted Wnt signaling, while up-regulating this pathway restored expression of endodermal markers. Collectively, these results uncover the AMPK pathway as a novel regulator of cell fate determination during differentiation. Overall design: 2 WT and 2 AMPK DKO ESC lines were differentiated into embryoid bodies (EBs) for various lengths of time (2, 4, 8, and 12 days) in high and low glucose conditions. Both ESC and EB samples were profiled by mRNA-seq to examine how global gene expression changes associated with ESC differentiation are affected by AMPK deletion.
AMPK governs lineage specification through Tfeb-dependent regulation of lysosomes.
Specimen part, Subject
View SamplesPurpose: Single-cell whole transcriptome sequencing was used to better understand the mechanism of action of our Dyrk1a inhibitor''s proliferation of pancreatic islets. Methods: primary pancreatic islets were isolated, cultured, and stimulated with either 0.1% DMSO or 3 µM GNF4877. Single cells were captured and cDNA isolated on a Fluidigm C1 instrument. Sequencing libraries were made with Nextera XT reagents (Illumina) and single-end 50 bp reads were generated on an Illumina HiSeq 1000. Reads were mapped to the rat transcriptome. Results: Consistent with GNF4877 eliciting beta cell proliferation, we observed an increase in the number of beta cells co-expressing insulin 1 and genes involved in cell cycle including the M phase marker Cyclin B1. Comparison of Cyclin B1 expressing cells from GNF4877-treated islets to beta cells from DMSO-treated islets further revealed a significant increase expression of genes associated with full cell cycle progression and enrichment of Gene Ontology (GO) categories for proliferation. Conclusions: Since only a small subset of islet cells proliferate when stimulated with GNF4877, single-cell transcriptome sequencing allowed us to examine expression of genes co-regulated with known proliferation markers and will hopefully allow us to characterize beta cell subsets which are responsive to proliferation-associated therapies. Overall design: 84 GNF4877-treated and 86 DMSO-treated rat islet cells containing greater than 100,000 mapped sequencing reads per cell and having a single verified cell per port were compared
Inhibition of DYRK1A and GSK3B induces human β-cell proliferation.
No sample metadata fields
View SamplesTo better understand the temporal dynamics of gene expression during normal murine lung development we characterized global gene expression at 26 time points in three common inbred strains of mice (A/J, C57BL/6J, and C3H/HeJ). The data set provides a unique resource for identifying patterns of gene expression changes during normal lung development and for investigating the developmental origins of respiratory disease.
Temporal dynamics of the developing lung transcriptome in three common inbred strains of laboratory mice reveals multiple stages of postnatal alveolar development.
Specimen part
View SamplesTranscription termination and mRNA export from the nucleus are closely regulated and coordinated processes. Nuclear export factors are recruited to actively transcribed genes through their interactions with protein complexes associated with transcription and co-transcriptional pre-mRNA processing. We determine a new role for the kinase WNK1 in the cross-talk of transcription termination and mRNA export. WNK1 was previously attributed a cytoplasmic role as a regulator of ion transport. However, we now show a nuclear function for this kinase where it is required for efficient mRNA export along with the transcription termination factor PCF11. Finally, we identify the phosphorylation of the CID domain of PCF11 as an important step for the release of the mRNA from the transcription locus, thus allowing efficient mRNA export to the cytoplasm. Overall design: RNA from cytoplasmic and nuclear extracts of HeLa cells was obtained, upon depletion of WNK1 kinase or from control cells. Upon pA selection, libraries were generated and sequenced. A duplicate experiment was performed for each sample.
WNK1 kinase and the termination factor PCF11 connect nuclear mRNA export with transcription.
Cell line, Subject
View SamplesThe pervasive nature of RNA polymerase II (Pol II) transcription requires efficient termination. A key player in this process is the cleavage and polyadenylation (CPA) factor PCF11, which directly binds to the Pol II C-terminal domain and dismantles elongating Pol II from DNA in vitro. We demonstrate that PCF11-mediated termination is essential for vertebrate development. A range of genomic analyses, including: mNET-seq, 3' mRNA-seq, chromatin RNA-seq and ChIP-seq, reveals that PCF11 enhances transcription termination and stimulates early polyadenylation genome-wide. PCF11 binds preferentially between closely spaced genes, where it prevents transcriptional interference and downstream gene silencing. Notably, PCF11 is sub-stoichiometric to the CPA complex. Low levels of PCF11 are maintained by an auto-regulatory mechanism involving premature termination of its own transcript, and are important for normal development. Both in human cell culture and during zebrafish development, PCF11 selectively attenuates the expression of other transcriptional regulators by premature CPA and termination. Overall design: Semi-nascent transcriptome measured by chromatin-bound RNA-seq in HeLa cells. Control and PCF11 knock-down (2 biological replicates) and control and PCF11 PAS1 deletion (4 biological replicates).
Selective Roles of Vertebrate PCF11 in Premature and Full-Length Transcript Termination.
Specimen part, Subject
View SamplesThe pervasive nature of RNA polymerase II (Pol II) transcription requires efficient termination. A key player in this process is the cleavage and polyadenylation (CPA) factor PCF11, which directly binds to the Pol II C-terminal domain and dismantles elongating Pol II from DNA in vitro. We demonstrate that PCF11-mediated termination is essential for vertebrate development. A range of genomic analyses, including: mNET-seq, 3' mRNA-seq, chromatin RNA-seq and ChIP-seq, reveals that PCF11 enhances transcription termination and stimulates early polyadenylation genome-wide. PCF11 binds preferentially between closely spaced genes, where it prevents transcriptional interference and downstream gene silencing. Notably, PCF11 is sub-stoichiometric to the CPA complex. Low levels of PCF11 are maintained by an auto-regulatory mechanism involving premature termination of its own transcript, and are important for normal development. Both in human cell culture and during zebrafish development, PCF11 selectively attenuates the expression of other transcriptional regulators by premature CPA and termination. Overall design: 3' mRNA-seq in individual zebrafish embryo heads. Two types of mutants: zPCF11 null and zPCF11 with deletion of PAS1. Wild-type (wt, +/+), heterozygous (het, +/-) and homozygous mutant (hom, -/-) embryos were analyzed. Wild-type and heterozygous animals were phenotypically indistinguishable.
Selective Roles of Vertebrate PCF11 in Premature and Full-Length Transcript Termination.
Subject
View SamplesThe pervasive nature of RNA polymerase II (Pol II) transcription requires efficient termination. A key player in this process is the cleavage and polyadenylation (CPA) factor PCF11, which directly binds to the Pol II C-terminal domain and dismantles elongating Pol II from DNA in vitro. We demonstrate that PCF11-mediated termination is essential for vertebrate development. A range of genomic analyses, including: mNET-seq, 3' mRNA-seq, chromatin RNA-seq and ChIP-seq, reveals that PCF11 enhances transcription termination and stimulates early polyadenylation genome-wide. PCF11 binds preferentially between closely spaced genes, where it prevents transcriptional interference and downstream gene silencing. Notably, PCF11 is sub-stoichiometric to the CPA complex. Low levels of PCF11 are maintained by an auto-regulatory mechanism involving premature termination of its own transcript, and are important for normal development. Both in human cell culture and during zebrafish development, PCF11 selectively attenuates the expression of other transcriptional regulators by premature CPA and termination. Overall design: 3' mRNA-seq in HeLa cells. Control and PCF11 knock-down (4 biological replicates); control and PCF11 PAS1 deletion clones muA and muB (3 biological replicates); control and additional PCF11 PAS1 deletion clones muC and muD (1 replicate).
Selective Roles of Vertebrate PCF11 in Premature and Full-Length Transcript Termination.
Subject
View SamplesThe effects of a histone demethylase inhibitor, GSK-J4, and L-ascorbic acid for the transcriptome in female ES cells were analyzed by RNA-sequence. Total RNA was used for high-throughput sequence with Illumina HiSeq 2500 and mapped to mm10. Overall design: Total RNA profile
Histone demethylation maintains Prdm14 and Tsix expression and represses xIst in embryonic stem cells.
No sample metadata fields
View SamplesIL-2 signals into CD8 T cells have a programming and regulatory role in driving cells to full effector and memory differentiation. This study was designed to look for IL-2 target genes that affect CD8 T cell responses.
Endoplasmic reticulum stress regulator XBP-1 contributes to effector CD8+ T cell differentiation during acute infection.
Sex, Specimen part
View SamplesZebrafish (Danio rerio) gutGFP transgenic embryos [Tg(XlEef1a1:GFP)s854] were collected at 4 time points: 2 days post fertilization (dpf), 3, dpf, 4 dpf, 6 dpf. Embryos were dissociated into single cells and sorted by FACS based on GFP expression.
FACS-assisted microarray profiling implicates novel genes and pathways in zebrafish gastrointestinal tract development.
Age
View Samples